package com.hp.btc.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class SessionFilter implements Filter {

	
	public void init(FilterConfig filterConfig) throws ServletException {
		
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        String contextPath = req.getContextPath();
        HttpSession session = req.getSession(false);
        if (null == session) {
        	res.sendRedirect(contextPath+"/errorTimeout.html");
        }else{
        	chain.doFilter(req, res);
        }
	}

	public void destroy() {

	}

}
